共查询到19条相似文献,搜索用时 140 毫秒
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大豆与大豆芽中异黄酮提取工艺研究 总被引:1,自引:0,他引:1
以乙醇为溶剂,分别以大豆、大豆芽为原料,研究了异黄酮的提取工艺,并在最佳工艺条件下探讨了两者中异黄酮的得率,试图寻找提取大豆异黄酮的最佳原料和工艺方法.结果表明温度、乙醇浓度、料液比、提取时间等'因素对异黄酮的提取均产生不同程度的影响,大豆芽中异黄酮含量比大豆中高.通过正交试验得出从大豆、大豆芽中提取异黄酮的最佳工艺条件分别为温度80℃,乙醇浓度70%,料液比120,时间2 h;温度80℃,乙醇浓度70%,料液比114,芽长6 mm,在此条件下异黄酮的提取率分别为1854、2105 μg·g-1. 相似文献
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大豆异黄酮提取工艺优化及其活性研究 总被引:1,自引:0,他引:1
研究大豆异黄酮提取的最佳工艺条件及其活性.在单因素试验和L9(34)正交试验的基础上,确定乙醇-水体系提取大豆异黄酮的最佳工艺条件:乙醇浓度80%,液料比(溶剂∶原料)24∶1,提取温度50℃.对异黄酮分别进行清除自由基和抑菌的活性研究,结果表明:大豆异黄酮有良好的清除羟基自由基和超氧自由基的能力;对金黄色葡萄球菌、大肠杆菌及米根霉的生长有明显的抑制作用. 相似文献
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Sarkaki A Amani R Badavi M Moghaddam AZ Aligholi H Safahani M Haghighizadeh MH 《Pakistan journal of biological sciences: PJBS》2008,11(8):1114-1119
The aim of this study was to evaluate the effects of different doses of dietary soy meals (with or without isoflavone) on dementia in ovariectomized (OVX) animal model of Alzheimer's disease. Female Wistar's rats with the exception of intact group were ovariectomized at the first line of study. Animals were divided into 2 main groups: control (c) and pre-treatment groups. Animals in pre-treatment groups received one of five types of diet during four weeks prior Nucleus Basalis Magnocellularis (NBM) electrical lesion normal diet (0), 10 g soy with isoflavone (10), 20 g soy with isoflavone (20), 10 g soy without isoflavone (-10) and 20 g soy without isoflavone (-20) in 30 g daily diet. The spatial learning and memory were tested using Morris water maze after electrical lesion. Rats were trained in water maze to find a hidden escape Platform. Rats received 6 blocks that each block consisted of 3 trials. Following acquisition trials, one probe trial was conducted in which the platform was removed. Soy meal diet (with or without isoflavone) in ovariectomized rats with Alzheimer's disease caused improvement of performance across 18 trials of Acquisition. Our results suggest that soy meal is a potential alternative to estrogen in the prevention and treatment of Alzheimer's disease. 相似文献
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Genovese MI Barbosa AC Pinto Mda S Lajolo FM 《Plant foods for human nutrition (Dordrecht, Netherlands)》2007,62(2):53-58
The knowledge of the contents and profile of isoflavones present in soy protein ingredients, as well as the effect of industrial
processing, is important for the development of functional foods rich in these compounds. The results obtained here showed
that the total isoflavone content varied significantly among products. For defatted and whole soy flours the total isoflavone
content ranged from 120 to 340 mg/100 g, for soy protein isolates from 88 to 164 mg/100 g, and for commercial textured soy
proteins, from 66 to 183 mg/100 g (wet basis, expressed as aglycones). The highest isoflavone content was found for soy hypocotyl
flours, from 542 to 851 mg/100 g. Compared to hypocotyl and whole and defatted flours, soy ingredients presented a decrease
of malonylglycosides and deesterified β-glycosides with a significant increase in the percentage of aglycones, mainly for
soy fibers (65–76%). While defatting was shown to cause isoflavone concentration without altering conjugation, extrusion process
caused destruction of isoflavones and a significant increase in the amount of acetylglycosides, but this effect was less intense
for the concentrates. From the results obtained it can be concluded that differences in isoflavone concentration and profile
may be related to oscillations in the isoflavone content present in the raw material and to the type of processing. 相似文献
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对150份不同类型大豆进行了相关分析.结果表明,不同类型大豆的蛋白质、脂肪含量与异黄酮含量具有一定的相关性.野生大豆和栽培大豆的蛋白质含量与异黄酮含量具有极显著负相关关系(r=0.378**,r=0.421**).野生大豆脂肪含量与异黄酮含量具有极显著正相关的关系(r=0.362**),栽培大豆脂肪含量与异黄酮含量具有正相关关系,但相关不显著.种间杂交后代材料蛋白质、脂肪含量与异黄酮含量无显著相关性.因此,利用低蛋白质、高脂肪大豆作为杂交亲本,可增加选择几率. 相似文献
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微量元素对籽粒中大豆异黄酮积累的影响 总被引:1,自引:0,他引:1
对两个大豆品种(高异黄酮品种中豆27和普通品种九农20)进行盆栽试验,施用七种微量元素(镁、硼、锰、锌、铜、铁和钼),利用高效液相色谱法(HPLC)检测大豆籽粒的异黄酮含量。结果显示,不同微量元素对大豆籽粒的异黄酮含量影响差异显著,其中五种微量元素(镁、硼、锰、铜和铁)使大豆异黄酮含量增高,但到一定浓度时,则含量下降;锌元素对大豆异黄酮含量的影响随着微量元素含量提高呈下降趋势;钼元素对大豆异黄酮含量的影响随着微量元素含量提高呈增高趋势。微量元素的含量对异黄酮含量的积累影响很大,镁、硼、锰、铜和铁五种微量元素的含量在0.5mmol/L~1.0mmol/L之间异黄酮含量最高。 相似文献